CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock		Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2021	[1]		287,918
Beginning balance at Jan. 31, 2021		$ 4,936,471	$ 28	[1]	$ 6,175,425	$ 439	$ (1,239,421)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	[1]		11,057
Issuance of common stock upon exercise of stock options		65,668	$ 2	[1]	65,666
Issuance of common stock under employee stock purchase plan (in shares)	[1]		259
Issuance of common stock under employee stock purchase plan		26,398			26,398
Vesting of early exercised stock options		423			423
Vesting of restricted stock units (in shares)	[1]		1,351
Stock-based compensation		328,242			328,242
Other Comprehensive Income (Loss)		702				702
Net loss		(392,939)					(392,939)
Ending balance (in shares) at Jul. 31, 2021	[1]		300,585
Ending balance at Jul. 31, 2021		4,964,965	$ 30	[1]	6,596,154	1,141	(1,632,360)
Beginning balance (in shares) at Apr. 30, 2021			295,790
Beginning balance at Apr. 30, 2021		4,958,321	$ 30		6,400,566	366	(1,442,641)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			3,975
Issuance of common stock upon exercise of stock options		24,451			24,451
Vesting of early exercised stock options		208			208
Vesting of restricted stock units (in shares)			820
Stock-based compensation		170,929			170,929
Other Comprehensive Income (Loss)		775				775
Net loss		(189,719)					(189,719)
Ending balance (in shares) at Jul. 31, 2021	[1]		300,585
Ending balance at Jul. 31, 2021		4,964,965	$ 30	[1]	6,596,154	1,141	(1,632,360)
Beginning balance (in shares) at Jan. 31, 2022			312,377
Beginning balance at Jan. 31, 2022		$ 5,049,045	$ 31		6,984,669	(16,286)	(1,919,369)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		2,448
Ending balance (in shares) at Apr. 30, 2022			317,814
Ending balance at Apr. 30, 2022		$ 5,457,994	$ 32		7,589,712	(46,587)	(2,085,163)
Beginning balance (in shares) at Jan. 31, 2022			312,377
Beginning balance at Jan. 31, 2022		5,049,045	$ 31		6,984,669	(16,286)	(1,919,369)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			3,942
Issuance of common stock upon exercise of stock options		23,567	$ 1		23,566
Issuance of common stock under employee stock purchase plan (in shares)			184
Issuance of common stock under employee stock purchase plan		26,094			26,094
Issuance of common stock in connection with a business combination (in shares)			1,914
Issuance of common stock in connection with a business combination		438,916			438,916
Issuance of common stock in connection with a business combination subject to future vesting (in shares)			409
Vesting of early exercised stock options		122			122
Vesting of restricted stock units (in shares)			1,623
Shares withheld related to net share settlement of equity awards (in shares)			(552)
Shares withheld related to net share settlement of equity awards		(86,134)			(86,134)
Stock-based compensation		394,884			394,884
Other Comprehensive Income (Loss)		(31,571)				(31,571)
Net loss		(388,600)					(388,600)
Ending balance (in shares) at Jul. 31, 2022			319,897
Ending balance at Jul. 31, 2022		5,426,323	$ 32		7,782,117	(47,857)	(2,307,969)
Beginning balance (in shares) at Apr. 30, 2022			317,814
Beginning balance at Apr. 30, 2022		$ 5,457,994	$ 32		7,589,712	(46,587)	(2,085,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,494	1,494
Issuance of common stock upon exercise of stock options		$ 8,437			8,437
Issuance of common stock in connection with a business combination (in shares)			74
Vesting of early exercised stock options		61			61
Vesting of restricted stock units (in shares)			775
Shares withheld related to net share settlement of equity awards (in shares)			(260)
Shares withheld related to net share settlement of equity awards		(31,989)			(31,989)
Stock-based compensation		215,896			215,896
Other Comprehensive Income (Loss)		(1,270)				(1,270)
Net loss		(222,806)					(222,806)
Ending balance (in shares) at Jul. 31, 2022			319,897
Ending balance at Jul. 31, 2022		$ 5,426,323	$ 32		$ 7,782,117	$ (47,857)	$ (2,307,969)

[1] On March 1, 2021, all shares of the Company’s then-outstanding Class B common stock were automatically converted into the same number of shares of Class A common stock, pursuant to the terms of the Company’s amended and restated certificate of incorporation. No additional shares of Class B common stock will be issued following such conversion. See Note 10 for further details.